u can use this. by using the following code i sent mail.
In this case i used Gmail account.
MailMessage mail = new MailMessage();
mail.From = new MailAddress(textBoxFrom.Text);
mail.To.Add(textBoxTo.Text);
mail.Subject = textBoxSubj.Text;
mail.Body = textBoxBody.Text;
SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
smtp.EnableSsl = true;
smtp.Credentials = new NetworkCredential("Your-Gmail-account", "gmail-password");
try
{
smtp.Send(mail);
lblStatusMsg.Text = "Message sent";
}
catch (SmtpException ex)
{
MessageBox.Show(ex.Message, "Error: " + ex.Message, MessageBoxButtons.OK, MessageBoxIcon.Error);
}